Brent Scowcroft

But figuring out Saddam Hussein was one our greatest mysteries. He marched to his own drummer and frequently as this unfolded he made decisions which were sometimes inexplicable to us and sometimes didn't look very smart.

I was only 8 years old on July 20, 1969, when Neil Armstrong, 38-year-old commander of 'Apollo 11,' descended the cramped lunar module Eagle's ladder with hefty backpack and bulky spacesuit to become the first human on the moon.

Whenever you have dynamic interactions between 300 million people and the American economy acting in really complex ways, that introduces a degree of almost chaos theory to the system, in a literal sense.